Gold-Catalyzed Intramolecular Alkyne Cycloisomerization Cascade: Direct Synthesis of Aryl-Annulated[<i>a</i>]carbazoles from Aniline-Substituted Diethynylarenes
作者:Kimio Hirano、Yusuke Inaba、Toshiaki Watanabe、Shinya Oishi、Nobutaka Fujii、Hiroaki Ohno
DOI:10.1002/adsc.200900880
日期:2010.2.15
Aniline-substituted diethynylarenes, which are readily synthesized through Sonogashira coupling reactions from commercially available 1,2-dihaloarenes, directly produce aryl- and heteroaryl-annulated[a]carbazoles by the gold-catalyzed intramolecular cascade hydroamination/cycloisomerization without producing theoretical by-products. This new atom-economical route is easily applicable to various ar
苯胺取代的二乙炔基很容易通过Sonogashira偶联反应由市售的1,2-二卤代芳烃合成,通过金催化的分子内级联加氢胺化/环异构化反应直接生成芳基和杂芳基环化的[ a ]咔唑,而不会产生理论副产物。 。这种新的原子经济的路线是容易地应用于各种芳基-环[一]咔唑含有烷基,芳基或酯取代基。